mySQL select maximum value for column A with same values in column B -



mySQL select maximum value for column A with same values in column B -

here's table in question, generated command @ bottom of question:

+--------------+-----------------+ | usr_postcode | pdp_point_total | +--------------+-----------------+ | ms2 8la | 160 | | ms2 8la | 140 | | ms2 8la | 110 | | ms2 8la | 100 | | ms2 8la | 90 | | ms2 8la | 80 | | ms2 8la | 50 | | ms2 8la | 30 | | wn4 9nv | 25 | | ms2 8la | 20 | | sl6 1sr | 10 | | sl1 4dx | 10 | +--------------+-----------------+

i'd find largest value in sec column each value in column one, output like:

------------- ms2 8la | 160 wn4 9nv | 25 sl6 1sr | 10 sl1 4dx | 10 -------------

the 2 columns different tables @ moment command:

select distinct users.usr_postcode, point_date_pairs.pdp_point_total users inner bring together point_date_pairs on users.usr_id_pk = point_date_pairs.usr_id_fk order point_date_pairs.pdp_point_total desc;

group should help:

select users.usr_postcode, max(point_date_pairs.pdp_point_total) users inner bring together point_date_pairs on users.usr_id_pk = point_date_pairs.usr_id_fk grouping users.usr_postcode asc

mysql

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